Graphical tools for writing SQL queries
Someone commented: But if it weren't for graphical tools, I wouldn't have ever been able to conceptualise a join
Fair enough. In which case, learn about joins, and then stop using your graphical tools. Once you know the difference between an inner join and a left/right join, then leave the graphical joins alone. I reckon the only use for graphical tools is to avoid typos in table names.